Presentation	1995/5/26 A Keyword Extraction Method by Using Statistical Text Information Hidekazu Nakawatase,
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Abstract(in English)	This paper describes a new method to extract free keywords automatically from a Japanese text. Morphological analysis is necessary to recognize words from a text for extraction of keywords. There exist, however, problems of unknown words recognition and ambiguity of compound words recognition, so dictionaries and complex heuristics are necessary to resolve them. This method is based on the N-gram method which need not morphological analysis. It includes 2 steps, evaluation of major strings using the N-gram statistics and the exclusion of nonsense strings. Therefore, this keyword extraction method is very simple and easily applicable to a large scale texts.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	keyword extraction / N-gram / natural language analysis / morphological analysis / statistics
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Conference Information
Committee	DE
Conference Date	1995/5/26(1days)
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Paper Information
Registration To	Data Engineering (DE)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	A Keyword Extraction Method by Using Statistical Text Information
Sub Title (in English)
Keyword(1)	keyword extraction
Keyword(2)	N-gram
Keyword(3)	natural language analysis
Keyword(4)	morphological analysis
Keyword(5)	statistics
1st Author's Name	Hidekazu Nakawatase
1st Author's Affiliation	NTT Information Systems Laboratories()
Date	1995/5/26
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Volume (vol)	vol.95
Number (no)	81
Page	pp.pp.-
#Pages	8
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